New 4850 - Fails a few seconds after boot

Does anyone have any tips for me? I just got a new ASUS EAH4850 to replace my 9800 Pro (artifacts in various games), and my video turns off a few seconds after booting. The system is booting up normally, just without video; I can press caps lock/numlock/etc, and remote desktop into the system after a minute. I do see the BIOS screen, and can go into the BIOS, but the video shuts off even if I am just in the BIOS.

Here's my system -
ASUS P5LD2-VM R2.0 - http://www.newegg.com/Product/Product.aspx?Item=N82E16813131044
Kingston 2GB RAM - http://www.newegg.com/Product/Product.aspx?Item=N82E16820134046
Antec True Power Trio TP3-550 - http://www.newegg.com/Product/Product.aspx?Item=N82E16817371002&Tpk=tp3-550

I have the PCI-E 6-pin connector plugged in, and don't see any other power connectors that are needed.

Thanks for any help!
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More about 4850 fails seconds boot
  1. Is the fan spinning on the card?


    ... and did you re-seat it?
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